反应详情

Add tetrakis(triphenylphosphino)palladium(0) (0.60 g, 0.52 mmol) to a solution of 1-bromo-4-nitro-benzene (0.76 g, 3.76 mmol) and (E)-3-cyclohexyl-2-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-prop-2-en-1-ol (1.13 g, 4.24 mmol) in dioxane (20 mL). Add cesium fluoride (1.75 g, 12 mmol) and stir the reaction mixture for 12 h at 80° C. Allow the reaction mixture to cool to r.t. Dilute the reaction mixture with ethyl acetate and wash with water. Separate the layers. Dry the organic phase over sodium sulfate, filter and concentrate. Purify the residue via silica gel chromatography, eluting with a gradient from 95:5 to 7:3 hexanes:ethyl acetate to obtain the title compound (0.67 g). 1H-NMR (CDCl3) δ=1.05-1.72 (m, 10 H), 1.89-2.04 (m, 1H), 4.28-4.36 (m, 2H), 5.61-5.69 (m, 1H), 7.34-7.43 (m, 2H), 8.18-8.26 (m, 2H).

1. washwash with water
2. customSeparate the layers
3. dry with materialDry the organic phase over sodium sulfate
4. filtrationfilter
5. concentrationconcentrate
6. customPurify the residue via silica gel chromatography
7. washeluting with a gradient from 95:5 to 7:3 hexanes